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louver board

American

noun

one of a series of overlapping, sloping boards used as louvers in an opening, so arranged as to admit air but to exclude rain or cut off visibility from the outside.

Etymology

Origin of louver board

Middle English word dating back to 1400–50

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.